title: Polysomnography and ApneaGraph in patients with sleep-related breathing disorders.
abstract: OBJECTIVE
  To evaluate whether ApneaGraph (AG) and polysomnography (PSG) deliver comparable results in patients with sleep-related breathing disorders.
  
  
  METHODS
  A prospective study was performed, which included 14 patients with obstructive sleep apnea syndrome. Apnea-hypopnea index (AHI), hypopnea index (HI), apnea index (AI), obstructive, central and mixed apnea, oxygen saturation (SaO2), pulse and body position were simultaneously assessed by PSG and AG in each individual.
  
  
  RESULTS
  There was a good correlation between measurements of AG and PSG for AHI, pulse, SaO2, body position and central apnea. However, our study showed differences between PSG and AG for AI (p = 0.002), HI (p = 0.013), mixed apnea (p = 0.003) and obstructive apnea (p = 0.013). AG indicated that 2/14 patients had a pure upper airway obstruction, 6/14 patients had a predominance of lower obstruction and 6/14 patients had a predominance of upper obstruction.
  
  
  CONCLUSIONS
  AG provides comparable results for AHI, pulse, SaO2, body position and central apnea when compared to PSG, but not for the rest of the measurements. Using AG, the distribution of sites of obstructive events could be identified in this study in all of the patients.
authors.affiliation: Department of Otorhinolaryngology, Head and Neck Surgery, School of Medicine, University of Mainz, Mainz, Germany. moralescarolina@web.de
authors.forename: Carolina
authors.initials: C
authors.lastname: Morales Divo
authors.forename: Oxana
authors.initials: O
authors.lastname: Selivanova
authors.forename: Torsten
authors.initials: T
authors.lastname: Mewes
authors.forename: Jan
authors.initials: J
authors.lastname: Gosepath
authors.forename: Rainer
authors.initials: R
authors.lastname: Lippold
authors.forename: Wolf J
authors.initials: WJ
authors.lastname: Mann
mesh_terms: D000328:Adult; D000368:Aged; D003948:Diagnostic Techniques, Respiratory System / Q000592:standards; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010100:Oxygen; D017286:Polysomnography / Q000592:standards; D011187:Posture; D011446:Prospective Studies; D011674:Pulse; D012119:Respiration; D012891:Sleep Apnea Syndromes / Q000175:diagnosis* / Q000503:physiopathology; D020182:Sleep Apnea, Central / Q000175:diagnosis; D020181:Sleep Apnea, Obstructive / Q000175:diagnosis
chemical_list: D010100:Oxygen